Zoo Code

Zoo Code

Roo Code
fx

fx

Vercel
+
+

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About

Zoo Code is an open source AI coding assistant for your IDE, built to help developers stay on task and ship great code with specialized modes and full model flexibility. Built-in Architect, Code, and Debug modes shape how the agent approaches different tasks, while custom modes let users create workflows for security reviews, documentation, or anything else they need. Architect mode can plan complex changes without editing files, producing strategy documents and file maps for review before code is written. The assistant supports multi-file editing, context management, customizable settings, and full bring-your-own-key support for any provider, making it fully model-agnostic. Every proposed change lands as a diff so developers can see exactly what will change before it touches the codebase, with no silent rewrites. External tools, databases, APIs, and custom resources can be connected through Model Context Protocol.

About

fx is a tiny, open, native coding agent harness and CLI written in Zig, optimized for research, performance, and embeddability as part of larger systems. Its design focuses on minimalism across the system prompt, tools, feature set, memory use, and a 6 MB binary, with an interface intended to feel closer to a Unix shell than a heavy terminal IDE. fx cold starts in microseconds and performs no unnecessary work or I/O before accepting input, making it suitable for programmatic use, resource-constrained environments, and agent sandboxes. Developers can start it inside a project and ask it to read files, search code, run commands, make changes, execute tests, and stream tool calls as they happen. The core is model- and provider-agnostic, supporting local models, gateways, direct provider access, and cloud inference. It is context-efficient by design, using a minimal system prompt and toolset to reduce token overhead and improve time to first token.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

Developers seeking to use a customizable, model-agnostic AI coding assistant for planning, editing, debugging, and navigating code directly inside their IDE

Audience

Developers and AI infrastructure builders in need of a solution to run or embed a lightweight, extensible, model-agnostic coding agent in terminals, applications, and automated systems

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

Free
Free Version
Free Trial

Pricing

Free
Free Version
Free Trial

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

Roo Code
Founded: 2026
United States
www.zoocode.dev/

Company Information

Vercel
Founded: 2015
United States
fx.sh/

Alternatives

Claude Code

Claude Code

Anthropic

Alternatives

Cline

Cline

Cline AI Coding Agent
Amp

Amp

Amp Code

Categories

Categories

Integrations

IntelliJ IDEA
Model Context Protocol (MCP)
Visual Studio Code

Integrations

IntelliJ IDEA
Model Context Protocol (MCP)
Visual Studio Code
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